The Carbonate System of the Estuaries of the Syran and Ul’ban Rivers (Ul’banskii Bay, the Sea of Okhotsk) during Spring Flood

Semkin, P. Yu.; Tishchenko, P. Ya.; Pavlova, G. Yu.; Tishchenko, P. Ya.; Sagalaev, S. G.; Shkirnikova, E. M.; Shvetsova, M. G.

doi:10.1134/s0097807822050141

Cited by 5 publications

(1 citation statement)

References 20 publications

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“…The obtained concentrations are comparable with the NO − 3 concentrations in anthropogenically polluted rivers; for example, in the Razdolnaya River flowing across an urbanized area in China and Russia (NO − 3 range is 10-30 µmol/L in the high water period and up to 300 µmol/L in the low water period) [51]; in Japanese rivers subjected to anthropogenic nitrate flux (NO − 3 range is 18-55 µmol/L) [52]; and in small rivers in China with anthropogenic effluents (NO − 3 range is 15-368 µmol/L) [53]. At the same time, the NO − 3 concentrations are much lower (0.02-0.37 µmol/L in the high water period) in the Sea of Okhotsk rivers not exposed to anthropogenic loads and volcanic activities [54].…”

Section: River Feeding Sources and Nutrient Fluxes With River Runoffmentioning

confidence: 99%

Nutrient Flux under the Influence of Melt Water Runoff from Volcanic Territories and Ecosystem Response of Vilyuchinskaya and Avachinskaya Bays in Southeastern Kamchatka

Semkin

Pavlova

Лобанов

et al. 2023

JMSE

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Nutrient fluxes with river runoff can largely determine the state of coastal water ecosystems. The Vilyuchinskaya and Avachinskaya Bays of Kamchatka Peninsula were surveyed on 4–5 July 2022, just after the peak of the spring–summer flood of the Vilyucha and Avacha Rivers associated with the snow melting in volcanic areas. Additionally, water sampling was performed in river water in December 2022, in the period of winter low water. A general undersaturation of CO2 of surface waters was observed in the Vilyuchinskaya and Avachinskaya Bays. Strong supersaturation of CO2 of the near-bottom waters was observed, due to microbial destruction of organic matter, especially in Avachinskaya Bay. This organic matter was formed as a result of photosynthesis in the water column, which subsequently gravitated to the bottom and concentrated in specific bottom depressions in the studied bays. In these depressions, black sediments were found, in which sulfate reduction occurred. The porewater of sediments had a very high concentration of organic carbon, dissolved and organic nitrogen, and phosphates, as well as CO2 partial pressure. The source of nutrients for the studied bays is tephra (volcanic suspended particles), which covers all the watersheds, including the soil and snow, as a result of volcanic activity in the study region. Based on the calculated nutrient fluxes in river runoff for the summer and winter seasons and the DIN/DIP ratios in river, sea, and pore waters, the causes of phytoplankton blooms, including the occurrence of red tides, are discussed. The maximum flux of nutrients and, accordingly, phytoplankton blooms should be expected in the years with the highest volcanic activity and high summer air temperatures, since the melting of nutrient-rich snow and ice will be maximum. This will determine the flux of nutrients in the river runoff of the Kamchatka Peninsula and contribute to phytoplankton blooms.

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Section: River Feeding Sources and Nutrient Fluxes With River Runoffmentioning

confidence: 99%

Nutrient Flux under the Influence of Melt Water Runoff from Volcanic Territories and Ecosystem Response of Vilyuchinskaya and Avachinskaya Bays in Southeastern Kamchatka

Semkin

Pavlova

Лобанов

et al. 2023

JMSE

View full text Add to dashboard Cite

show abstract

Diverse nature of the seasonally coastal eutrophication dominated by oceanic nutrients: An eco-system based analysis characterized by salmon migration and aquaculture

Zhang

Tishchenko

Zeng

et al. 2023

Marine Pollution Bulletin

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Phytoplankton Primary Production in the Сoastal Water Surrounding Shantar Archipelago

Tishchenko

Semkin

et al. 2023

Russ J Mar Biol

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The Carbonate System of the Estuaries of the Syran and Ul’ban Rivers (Ul’banskii Bay, the Sea of Okhotsk) during Spring Flood

Cited by 5 publications

References 20 publications

Nutrient Flux under the Influence of Melt Water Runoff from Volcanic Territories and Ecosystem Response of Vilyuchinskaya and Avachinskaya Bays in Southeastern Kamchatka

Nutrient Flux under the Influence of Melt Water Runoff from Volcanic Territories and Ecosystem Response of Vilyuchinskaya and Avachinskaya Bays in Southeastern Kamchatka

Diverse nature of the seasonally coastal eutrophication dominated by oceanic nutrients: An eco-system based analysis characterized by salmon migration and aquaculture

Phytoplankton Primary Production in the Сoastal Water Surrounding Shantar Archipelago

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